DEC-17989 itext XXE安全漏洞修复，参考 930a1c81f8

fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/SafeEmptyEntityResolver.java

@@ -0,0 +1,18 @@
+package com.fr.third.com.lowagie.text;
+
+import java.io.IOException;
+import java.io.StringReader;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * @author Hugh.C
+ * @version 1.0
+ * Created by Hugh.C on 2021/4/26
+ */
+public class SafeEmptyEntityResolver implements EntityResolver {
+    public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
+        return new InputSource(new StringReader(""));
+    }
+}

fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/pdf/XfaForm.java

@@ -49,6 +49,7 @@
 
 package com.fr.third.com.lowagie.text.pdf;
 
+import com.fr.third.com.lowagie.text.SafeEmptyEntityResolver;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -140,6 +141,7 @@ public class XfaForm {
         DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
         fact.setNamespaceAware(true);
         DocumentBuilder db = fact.newDocumentBuilder();
+        db.setEntityResolver(new SafeEmptyEntityResolver());
         domDocument = db.parse(new ByteArrayInputStream(bout.toByteArray()));   
         extractNodes();
     }

fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/xml/xmp/XmpReader.java

@@ -46,6 +46,7 @@
  */
 package com.fr.third.com.lowagie.text.xml.xmp;
 
+import com.fr.third.com.lowagie.text.SafeEmptyEntityResolver;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -85,6 +86,7 @@ public class XmpReader {
 	        DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
 	        fact.setNamespaceAware(true);
 			DocumentBuilder db = fact.newDocumentBuilder();
+			db.setEntityResolver(new SafeEmptyEntityResolver());
 	        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
 	        domDocument = db.parse(bais);
 		} catch (ParserConfigurationException e) {

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/SafeEmptyEntityResolver.java

@@ -0,0 +1,18 @@
+package com.fr.third.v2.lowagie.text;
+
+import java.io.IOException;
+import java.io.StringReader;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+/**
+ * @author Hugh.C
+ * @version 1.0
+ * Created by Hugh.C on 2021/4/26
+ */
+public class SafeEmptyEntityResolver implements EntityResolver {
+    public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
+        return new InputSource(new StringReader(""));
+    }
+}

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/pdf/XfaForm.java

@@ -49,6 +49,7 @@
 
 package com.fr.third.v2.lowagie.text.pdf;
 
+import com.fr.third.v2.lowagie.text.SafeEmptyEntityResolver;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -140,6 +141,7 @@ public class XfaForm {
         DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
         fact.setNamespaceAware(true);
         DocumentBuilder db = fact.newDocumentBuilder();
+        db.setEntityResolver(new SafeEmptyEntityResolver());
         domDocument = db.parse(new ByteArrayInputStream(bout.toByteArray()));   
         extractNodes();
     }

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/xml/xmp/XmpReader.java

@@ -46,6 +46,7 @@
  */
 package com.fr.third.v2.lowagie.text.xml.xmp;
 
+import com.fr.third.v2.lowagie.text.SafeEmptyEntityResolver;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -85,6 +86,7 @@ public class XmpReader {
 	        DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
 	        fact.setNamespaceAware(true);
 			DocumentBuilder db = fact.newDocumentBuilder();
+			db.setEntityResolver(new SafeEmptyEntityResolver());
 	        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
 	        domDocument = db.parse(bais);
 		} catch (ParserConfigurationException e) {